Grinding machine



May 6,1930. O. DOUTT I 1,757,559

- GRINDING MACHINE Filed April 2, 1928 6 Sheets-Sheet 1 May 6, 1930.

6 Sheets-Sheet 2 Filed April 2, 1928 awozmq May 6,1930. 0. DOU'II'T v 1,757,559

GRINDING MACHINE Filed April 2, 1928 6 Sheets-sheaf 3 y 1930. o. DOUTT GRINDING MACHINE Filed April 2, 1928 6 Sheets-Sheet 4 0. DOUTT GRINDING MACHINE May 6, 1930.

s Sheets-Shet 5 Filed April 2, 1928 awe/who's May 5,1930. Q DOUTT 1,157,559

GRINDING MACHINE Filed April 2, 1928 6 Sheets- $hee1 6 l 4W! 4) 3 V Q I V f7 a Mont Patented May 6, 1930 Chine and} 1 more par-tieulair-lyr to a machine feeth the: bars-- th the grinding; element and:

which will" automaticirlly' regulate the{ .-pres-;

sure? holdihgisaid bars: in- Contact with the abmsi-v'e or; polishing element fu-rfiher m: object is to aii-toma 'ticzfllyr compensate for irmgulirities in the'sha p or in the'thiekness oftherbaryin the machinef A further object- 1'st6 pr dv iderai workholder to *feed" cu' vedi baa s liiw-ingieyes zyfifheirendysuchas burhpei T5} barsfio the giinflingsoi polishing: mechanism and' to-"ziutoniatically regulate: chef-pressureexer bed' hy' Said Ba-I'S 01i 1 the grinding :Qr- 301-, 'ishing: elemen th A further 5 obj 60b is to pro-' widew 'work hdlder fbn'feeding cun'ved creation "of? exizessiv ehezitat' the; point of Contact with the;abtasivewv'buifing*elrhenhg Eur-the? andmore or; less-limited objfets wilb be app ELF-811i) fi bm the following descrip; tion; from the: drawings-arid from: the: use of; the. article's covered by? the appended" claims.

Des'c-nifption of specific; embbdimenf's: of

. ti -is; an impfovemenh 192's Serial 1 10; 2663555,

fied-fo lnof feedwhee; 9: showseyplan- V View offi'nhe feed Wheel shown in Fig.5 8 'i'Fig,

Fig; -1'1 shows a detailedgsidefelevatiqn of; one

upon fuhe )vheebshpwn in- 8"; 12 shows adetailed. bottom;- aflzm View, of% the 116. general assembly of-thisjmgehihei,

similar t0; that shown-in my prior-- applich shaft- 6; etransmission- Ea train-:Of gears" 85 8,-

8 2x1141; d shziftv ito which the feed Wheel is k'eyech The-fieed-Wheelzihdifs chivingmeehanism; are 7 supportedija' s, a unit upoh theshelf lOvwhi'ch is s1i'dab1y suppifi'tedfromyther standards 11; 11 1151.1 1; by; mean of the threaded shafts- 1-2 12 which he raised gears-14 1"); keyed-theTetmwhieh mes-1'1" \fi th ring ge'zufi (nbii; show-11 which Ea re threaded to th thfeads of sha'f fis 12 12:; but which are heldvagainsi; 'verticelymovement; on} said slfouldvrhe madesufficiently large ai-I'O'W of the blbelis-usediteholdlthe endeofthe.bars;

beniade cbiisidenzzblyawide rto accbmmbdath 1 a I 1,757,55e

With this construction the plate 21 may be It is apparent that a single rest and a 7 moved freely within a restricted area and the tensioned spring 24, fastened at its inner'end to thefeed wheel and at its outer end to the plate 21, resiliently confines the outer end of the plate to hold the bars against the said wheel. wThe plate, 22 issimila-r to plate 21 except thatthe slots 25, 25 are elongated in p I an aperture atfits rear end. The forward at 26, to providea narrowed contact'with the orderto giverelatively greatermovement of the pin 20, along the circumference of the feed wheel and to SoacCdInmodate bars of varying lengths. Bolts 23*, 23 of smaller; cross section than thewidth of the slots 25, 25 and a spring 2%, areused as described in connection with plate 21. 7 Upon the side-of the feedrwheelfopposite that on which the plate21 is supported,a trigger 26 is pivotally mounted upon the *bolt 23} passing through portion of the trigger is cut down, as shown pin 19. Aspring wire 2?, fried at its rear end. to the feed wheel-4, has'contactlat its 1 forward end with the undersurface of p the forward portion-of the trigger 25 .and'eXerts a pressure thereon tending to holdthetrig ger'in contact with the pin19.

An outward pressure is exerted upon the inner surface of the bar! 18 1-b'y'the resiliently mounted rests 28 and 29. Each oftheserests is supported from the stem 30' (Fig. 5) [hav-' ing a-plunger 31 at its lower end: A casing 32 isthreaded into an aperture in, oris' otherwise suitably fastened to,"the rim of the feed wheel and has an aperture adapted to receive the stem 30-andan enlarged aperture adapted to receive the plunger-3l. recoil spring 33, extending between the" plunger- 3lfand the stop34, holds each rest in a posi-' tion elevated above the 1 surface of the feed wheel 4. Thestop 34 is held inposition by a pin 35 through one of various holes 36, 36 so that the pressure of the spring'33 upon the plunger 31 may be regulated by fixing the i stop 34 in a suitable position. In the form shown thepressure .uponthe spring may also be varied by serewlng the caslng 32 into'or out of the aperture in the feedwheel'Q'the.

lock nut 37 being used tohold the casing in the desiredlposition 7 By this means the nor-:

malposition offlthe rests in redeem-t0 the surface of the wheel will be raised or lowered. Pins 38'and 39 are connected-totherests 28 and 29, respectively, intermediate the. stems 30, 30." These pins moving in the wells lOand 41 serve a s guides and prevent' turning of the" V respective rests upon theirfc entral supports.

The. outer end29: of each rest 29textends beyondthe edgeofthe feed wheel and'is bent downward to provide I agsl anting. guide" to facilitate the positioning--of-the.bars upon the tests and the depressing of the rests:

The outer surface of each rest 28 and the inner surface of each rest 29 are beveled for a similar purpose.

single tension device could be substituted for the separate units herein shown but the use. of the two separate tension devices and two separate rests is preferred'where'two bars are being handled .at the same time since by this means-variations in the thicknesses of thetwo bars willbe accommodated. The dime er. pf t e eednhee nd: t leea i n f ,thef'recesses"15;and1 1 and thepins l9 and 20 maybe varied ftofaccommo'date bars of dif'-' ferent; -cu r.vature and of diflerent lengths. This fe ed'wheel may be usedeither with one bar orwith a plurality of bars upon. the same pins, depending upon the shape'of the article to be Polish d 01 buffedp J 5 I V The operation of the machine "is as-follows wheel so that the desired pressure will be exerted byfthe bars upon the grinding or olishing wheehthe' motors are started to rotate the feed wheel. and the grinding wheel. in the same orfopposite directions, with'the feed wheel preferably operating at a some- -what"'slower speed than the grinding or polishing wheel. One or more bars may. then After adjustingthe! height of the shelf 10' and the several tensioning devices on 'the'feed I b-"ap lied'to. theupperportion of the feed wheel by'depressingthe trigger 25 and slip-' pingrthe eyes atjthe ends 10f the barsyover the pins 19 and 20. Asthe. wheel rotates the barsEwilllcoinejin contact: Withlthe grinding Or polishing; wheel and will be depressed therebyagainst-the force of the springs sup porting the rests 28 and 29; These springs willkresu'lt in a constant pressure upon l3l1(5 .gr inding orpolishinggwheel regardless of minor variations in the thickness of the'ba'rs', After the bars have passed thegrinding elc-i merit they may be removedbypressing trig-' ger 25 and slipping the bars oil; of the pins.. -The operation may thenbe repeated For; if" desired, the same bars may be left on the .wheel for more than onerotationfi r The'springteusion devices are of greatest importance in f-the 'continuous automatic 'grindingbr polishingof bars of spring. steel such-"as 'tho'sejused' jforl bumper bars. In. grinding suchbarsxgreat care mustibetaken to avoid overheating thebars at the points of contact with the grinding 'eleinent and I'thus changing the temper of-the bars. By my in ventionl haveprovided a ma'chine inwhi ch the bars may be continuo usly. and iautolnatir. cally ground or polis'hedtwithoutthe genera-.-

tiono'f eXcessiveheatatthe points of contact of the 'rindin or 'olishin' elelnent with the" b a 1:. v

bars;

' unintentional removal of bars from the feed iii-57,559

by spacers e7 which may be varied in their dimensions to accommodate bars of diiierent length and bars having eyes at their ends of diil'erent diameter. The spacers' l'r' are fas-i tened to the rim of the wheel 44 by set screws 48 passing through the 'rim of the wheel and threaded into'the said spacers or by other suitable means. Each sideof each spacer is provided with a curved recessed portion 49 adapted to enclose a portion of an eye at an end of a barand to prevent outward movement of the same; The forward end of V movable in apertures in the rim ofthe feed wheel, and resiliently .supportedjby spring metal arms 52 connected to the inner'sldeof the rim at a distance from the said aperture,

provide convenient means for resisting the completed the bars may be removed by again,

depressing the pins 51, '51 andwithdrawing the bars from the recesses 49, 49; It is de sirable in this modified form of my invention that thespacers be so shaped as to make a smooth curve between the adjacent ends of two consecutive bars. not essential to my invention but It will pre- The diameter of the wheel and the width of the spacers t? may be'varied to accommodate bars of different curvature and of different length. One or more bars maybe applied to the wheel for butling at the same time, the number of said bars depending upon their width relative to the width of the feed wheel and the grinding element.

In the operation of my grinder the shelf 10 may be raised or'lowered to accommodate different sizes of grinding, polishing or butlpolishing and to use my modification for bufling, where the heat generation is'not so great. It is apparent, however,:that either feed wheel could be used for a'grinding, polthe seo e" oft lie ention-tosu ch' saecificwa Such arrangement is j r'o stationii p'rope r V e taken regulating the s ed and direction of the wheels a the pressure upon wheels of the article's fed thereto. It is not intended therefore to limit the use otmy heel'tothe particular application in iection with-which it-hasb'een'd'e' i-bed where the "er-in fgrinding polislr g,- or rig is user -1tjis notintended to restrict operation) 1 a Having thusdescribed m invention, what I elaimis 1 Ina teed wheelfor supplyingcurved ha I viiigeyesatthei-r end tova grinding erberfiag element; the combination of means carried by said wheel and contacting-Witli said eyes ater; retai-ni said bar's'u'pon "said li-ent y actuated means tor: re-

taining said eyes 1 cont'act with said'first g; mentionedmeans $231k feedwheel compris p I ,carri'e'dby said wheel tofresi sting movement of work-trend the periphery thereof; and resilient I-ne'a v for; resisting movement of said i work" ow dsairdwheeh i 3, A feed wheel' for a grindingor, butting m-acliine com-prising means' carried by said 1 wheel 5 for holdingwerk onth'e' periphery thereof, "an d- 'resilientlyactuated r nea-n s for "regut lath the pressure at said", work upon the grinding'or'butfing element; 6' g L A worl'i' teeder' for feeding: bars to g, riding or-bulfing machine; com-prising a wheel carrying means for resiliently retm'nf -f inggtli'e end-slof said bars; and resilient 'i'neans interim are the ends ofsaid bars for r'esistingIn-oi inent 'ofsaid bai s toward said Wheel. 5: n e'ork holdenco'mo singa wheel car y rig means adaptedto. r 21TH bars ad]a'ce nt 12 .5 vent the wheel from cuttlnginto the bars as the latter come in contact withthewheeh the periphe said wheel, meansa'dapte d to resiliently resist movement'ot said barstowheeh'the-sa ld la-st mentioned means comprising separate rests adaptedito *bear upon each baryarrd'afl resilient v T support 1 i: for each rest carried by said Wheel. 7

6. In a feed'wlieel for grinding or buff 111g mac'lnnethe combiiratioirwitli means for retaining said; bars up on the sur' ace of said esilient means for resi tingfmovent p1- said" barsitowar d" isali wheel, said re- In. a. feed wheel? ligl i' f l 16, ll v actuated means adapts I articles tobe ground or bi'fied, fresili ly'ac'tu'ated means i'ntermedi 't th end of said art cles IQSlStll'lg movements thereof toward said wheel, said resist ng means comprising a plate adaptedto bear upon the undersurfaceof said article, said plate beingac tuated through a'shaft and plunger connected therewith by a springbetween an adjustable I stop and said plunger.

' 8..A feed wheel for a grinding or buffing 7 machine comprising a wheeladapted to carry the work upon its peripheral surface, re-

siliently actuated means carried by said wheel Q for holding the work thereon, said means be-' 7. V 7 ing adjustablefor varying; lengths of work, and resilient means for resisting movement of a I g said work toward the surface of said wheel. a r

; 9.: A work feeder for a grindin'gor'bufling machine comprising a wheel adapted to support the work on its peripheral surface, and means carried by said wheel for resiliently retaining said work, on the surface of the wheel. 7

,wheeladapted to receive the eyes atthe ends II 10. A work feeder for supplying bars hav- 7 ing eyes at their ends to a grinding or bufiing element, said feeder comprising awheel adapted to carry said bars, on its peripheral surface, pins adapted to be, positioned in the eyesv at the ends of theba rs and supported by a plate fastened to 'said wheel so as to allowlimited movement relative thereto, and resilient means for'resisting outward'movement-of said plate. 7 r

11. A work holder for supplying bars having eyes at their ends to a grinding or bufiing element, saidholder comprising a' wheel adapted to; carrysaid-barsmn its peripheral.

surfaces, recesses across thesurface: of said I of the barsand'to allow ;m'ovement thereof saidwheel, and resilient-means for resisting 40 outward movement of the portion of said resiliently actuated meansfor; resisting mover therein, pins adapted to bepositionedin the f eyes at'the ends of the bars and supported at one end by plates fastenedto said wheel so as to allow'limited-movement relative to plate to which saidpin is fastened.

1.12. .A feed wheelfor a grinding orbuifing machine comprising a wheel, having a recessed portion in 1 its peripheral surface adapted to receive an end portion of a bar to be ground or buffed, resiliently actuated means carried by said wheel for holding the said end portion of the barin said recess, and

merit of said bars towardsaidfwheel.

13. In an abrading orl'grinding machine V the combination with a grinding element, of a rotatable feed means adjustably'mounted relative to said grinding lelement; said, feed means comprising a wheelfadapted to carry bars upon its peripheral surface, spring actuat-ed means carried by said wheel for holding said bars on said wheel, and spring actuated means for resisting movement of said bars toward the periphery of said Wheel.

In testimony whereof,- I hereunto aflix my signature. V v I OVYEN DOUTT.) 

